The plot might involve the Muggle partner initially being in awe of the wizarding world Remus is from. Remus, on the other hand, is worried about how his werewolf nature will affect their relationship. As they get married, they have to deal with the prejudices of both the wizarding and Muggle communities. For example, some wizards might look down on Remus for marrying a Muggle, and some Muggles might be scared of the strange things associated with Remus' world.
In a 'Remus married a Muggle' fanfiction, the plot could start with Remus meeting the Muggle by chance. They fall in love, and despite the differences, they decide to get married. However, Remus' friends in the wizarding world, like the Marauders, might have mixed feelings about it. Some might be supportive, while others might be worried about the implications. As the story progresses, the couple could face threats from dark wizards who see their relationship as an abomination or a weakness. They would then have to fight to protect their relationship and each other, all while Remus is still dealing with his monthly werewolf transformations and trying to keep his Muggle spouse safe during those times.
One possible plot could be that Remus tries to keep his wizarding world a secret from his Muggle spouse at first. But as time goes on, small magical incidents start to occur around the house, and he has to come clean. Then they face the challenges of the Muggle - wizard divide together.
I'm not sure about specific 'Remus married a Muggle' fanfictions off the top of my head. You could try searching on popular fanfiction websites like Archive of Our Own. There are likely to be some interesting stories there.
One possible plot twist could be that they keep their marriage a secret from the wizarding world because of the age difference between them. Hermione is much younger than Remus, and the wizarding society might not accept their union easily. Another twist could be that they got married secretly to protect each other. Maybe there's a dark force threatening them, and by being married secretly, they can use some magic spells or charms that are only available to married couples to keep each other safe.
Well, perhaps the plot could be that a muggle accidentally stumbles into the wizarding world where Voldemort is still a threat. The muggle might initially be terrified but then discovers some hidden power within themselves that could potentially help in the fight against Voldemort.
Perhaps in this fanfiction, Harry marries a Muggle who has some unique qualities. For example, she might be an artist who sees the world in a very different way. Harry is attracted to her creativity and her non - judgmental attitude towards his wizarding abilities. The story could revolve around how they build a life together, with Harry having to keep his wizarding side a bit of a secret from the Muggle world, but also sharing some magical experiences with her in a very private way.
One possible plot could be that Draco, after the war, has a change of heart. He meets a Muggle by chance. At first, he's conflicted because of his pure - blood upbringing. But as he gets to know her, he falls in love. Their relationship faces challenges from both the wizarding world that looks down on Muggles and the Muggle world that doesn't understand magic. Eventually, they overcome all these and get married.
Well, it could start with them falling in love secretly. Maybe they meet during one of Hermione's research projects on werewolves. Their relationship blossoms, and they decide to get married. In the marriage, they face opposition from some of their friends who think the age gap is too much. But they prove everyone wrong by having a strong, loving relationship where they support each other's causes, like Hermione fighting for the rights of magical creatures along with Remus.
One potential Muggle actress could be Carey Mulligan. She has a great range as an actress and could bring a lot of depth to the role of the Muggle wife in the fanfic. Also, Felicity Jones could be a good candidate. She has a charm about her that would fit well with the idea of being Harry's Muggle actress wife. It could be interesting to see how her acting skills would be incorporated into the story, like if she used her acting to help Harry in some undercover wizarding missions in the Muggle world.
Well, one possible plot could be that Harry discovers a new threat that is specifically targeting Muggles. The wizarding world is either unable or unwilling to help, so Harry decides to take matters into his own hands. He uses his magic in secret ways to blend into Muggle society and eliminate the threat one by one. For example, he might use a modified version of the Disillusionment Charm to stay hidden while stalking his targets.
Well, one possibility is that Draco has to hide his wizarding identity in the Muggle world. He might struggle with the simple, non - magical daily life at first. For example, using Muggle technology instead of magic for basic tasks like cooking or cleaning. He could also meet a Muggle who makes him see the Muggle world in a new light, perhaps a kind neighbor or a co - worker.
Well, in a 'Harry Potter marries a Muggle' fanfiction, the plot might involve Harry being on the run from some dark wizarding forces who are after him for his fame. He hides among Muggles and meets a girl who helps him without knowing his true identity at first. As they get to know each other, he realizes he can't keep his secret forever. But she accepts him for who he is, wizard and all, and they end up getting married. It could also include elements of Harry teaching her some basic magic for self - defense.